JPH0612155A - Power source control system - Google Patents

Abstract

PURPOSE:To reduce the consumption of battery electric power at the time of a power failure by monitoring the connection state between a modem and a device to be controlled by a controller and controlling a power unit according to the line state. CONSTITUTION:When there is an incoming from a pay telephone network in the state of the power failure, a controller 20 judges an operation request from a terminal device. etc., to the device 5 to be controlled and sends out an actuation signal to the power unit 10. The power unit 10 supplies power to the modem 2 under control and device 5 to be controlled and places the terminal device in specific operation without making it aware of the power failure. Further, when a power failure signal from electric power facilities 11 is ceased, the controller 20 sends out the actuation signal to the power unit 10 immediately to enter a normal operation state. Thus. the power consumption of the battery 11a at the time of the power failure is reducible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control system, and more particularly to an efficient method of operating a battery incorporated in a power facility.

[0002]

2. Description of the Related Art In communication equipment and the like, 24-hour non-stop operation is generally required. FIG. 6 is a conceptual diagram of the configuration of a conventional communication system. In the figure, 1 is a terminal device, 2
Is a modem (M / D) as a line terminating device, 3 is a public telephone network connected to the modem 2, 4 is a modem connected to the public telephone network 3, and 5 is a control target connected to the modem 4. It is a device.

In the system thus constructed,
When a command is issued from the terminal device 1, this command is modulated by the modem 2 and then enters the public telephone network 3. The command that has passed through the public telephone network 3 enters the receiving side modem 4, is demodulated, and then enters the controlled device 5. The controlled device 5 performs predetermined processing according to the received command.

By the way, in this type of system, since the non-stop operation for 24 hours is required as described above, the controlled device 5 is backed up from an auxiliary power supply facility such as a battery so that it can be operated even during a power failure. It is normal to be told. In this type of system, when the control target device 5 is newly added, the power consumption increases, and the power supply possible time of the battery becomes short. Therefore, it is necessary to take measures to extend the power supply time of the battery.

Conventionally, the following method has been adopted to extend the power supply time during a power failure. The power consumption of the controlled device 5 on the side supplied with power from the battery is reduced. Power to the controlled device 5 is turned on only during operation.

[0006]

The above method is a conventional approach and does not matter here. The above method does not cause any particular problem when the controlled device 5 is a negligible rise time such as a facsimile. However, in the case where the controlled device 5 is a relatively large device such as an exchange, it takes time to read the control program, set the environment, etc. after receiving the command, and the rise time thereof tends to become non-negligible.

As described above, in a device whose rise time cannot be ignored, after requesting a connection via the public telephone network 3, the device waits until it is actually usable (until a response is given on the terminal device 1 side). The problem (reduction of service) was caused.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a power supply control system capable of reducing the power consumption of a battery during a power failure.

[0009]

FIG. 1 is a block diagram showing the principle of the present invention. The same parts as those in FIG. 6 are designated by the same reference numerals. In the figure, 2 is a modem connected to the public network,
Reference numeral 5 is a control target device that is connected to the public network via the modem 2 and performs a predetermined process. Reference numeral 10 is a power supply device that supplies power to the modem 2 and the control target device 5. Reference numeral 11 denotes a power facility that creates a power source from a commercial power source, supplies power to each device, detects a disconnection of the commercial power source, outputs a power failure signal, and supplies power from a built-in battery 11a at the time of power failure. It is a control device that detects an incoming signal from a public network and a power failure signal from the power equipment 11 and controls start / stop of the power supply device 10. For example, a power supply voltage of −48 V is generated from the power equipment 11, and the power supply device 10
And the control device 20.

[0010]

The control device 20 is always activated with respect to the power supply device 10 while receiving power from the normal commercial power supply. When a power failure signal is received from the power equipment 11 in this state, a stop signal is sent to the power supply device 10 as quickly as possible within a range where the operation of the controlled device 5 is not adversely affected.

It is assumed that there is an incoming call from the public network in this power failure state. The control device 20 determines that the operation request is for the controlled device 5 from the terminal device or the like, and the power supply device 1
A start signal is sent to 0. The power supply device 10 supplies power to the modem 2 and the controlled device 5 which are subordinate devices, and causes the terminal device to perform a predetermined operation without being aware of a power failure. When the power failure signal from the power equipment 11 disappears, the control device 20
Immediately, a start signal is sent to the power supply device 10 to shift to a normal operation state. In this way, according to the present invention, it is possible to provide a power supply control system capable of reducing the power consumption of the battery at the time of power failure.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 2 is a configuration block diagram showing an embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals. In the system shown in the figure, the control device 20 monitors the connection state between the modem 2 and the controlled device 5 via the line monitor 21, and the control device 20 controls the power supply device 10 according to the line state. It is a thing.

In the control device 20, a line monitor 21 is connected to the public network and monitors the state of the line. The line monitor 21 has a function of detecting an incoming call from the public network and a function of determining whether or not the modem 2 is using the public network. A control unit 22 receives the status signal from the line monitor 21 and controls the start / stop of the power supply device 23.
Is a power supply unit that receives power (-48V) from the power facility 11 and supplies power to the control unit 22 and the line monitor 21.

The power supply unit 23 is a power source for the control device 20, and is always operated regardless of the presence or absence of a power failure signal. This is because the control device 20 needs to be constantly operating. The power failure signal from the power facility 11 is sent to the control unit 2
Is given to 2. The operation of the system configured as described above will be described below.

When the power equipment 11 is receiving power from the commercial power source, no power failure signal is output. Therefore, the voltage on each device
48V is always supplied. In this state, the control unit 22
Causes the start / stop signal to be activated regardless of the state of the line monitor 20, and power is supplied from the power supply device 10 to the modem 2 and the controlled device 5.

If the commercial power supply is cut off,
A power failure signal is output from the power equipment 11, but power supply output-
48V is supplied. That is, the power feeding unit 23 supplies power to the line monitor 21 and the control unit 22. When the control unit 22 receives the power failure signal, it looks at the output of the line monitor 21 to check whether the modem 2 is using the public network.

If the line is not used by the modem 2, a stop signal is promptly output to the power supply device 10. As a result, the power supply from the power supply device 10 to the modem 2 and the controlled device 5 can be stopped, and wasteful consumption of the battery 11a can be suppressed. If the line is used by the modem 2, the control unit 22 waits until the line becomes free, and gives a stop signal to the power supply device 10 when the line becomes free.

In this power failure state, when the line monitor 21 detects an incoming call from the public network, the following operation is performed. First, when the control unit 22 receives an incoming signal from the line monitor 21, it activates the power supply device 10. As a result, power is supplied from the power supply device 10 to the modem 2 and the controlled device 5, and these devices start predetermined operations.

When the commercial power source is restored, the power equipment 11
The power failure signal from is turned off. When the control unit 22 receives this off signal, the control unit 22 receives the off signal regardless of the output of the line monitor 21.
The power supply device 10 is activated. Upon receiving the activation signal, the power supply device 10 supplies power to the modem 2 and the controlled device 5. In addition, when the power failure signal OFF is received,
When the stop signal is in the activated state, the control unit 22 maintains the activated state as it is.

FIG. 3 is a block diagram showing the configuration of another embodiment of the present invention. The same parts as those in FIG. 2 are designated by the same reference numerals. In this embodiment, the operating state of the controlled device 5 is notified to the control device 20, and the control unit 22 controls the power supply device 10 according to the operating state of the controlled device 5. In the figure, reference numeral 24 is an incoming call detecting unit for detecting an incoming call from the public network. From the controlled device 5, an operating display signal is input to the control unit 22. Other configurations are the same as those in FIG. The operation of the system configured as described above will be described below.

When the power equipment 11 is receiving power from the commercial power source, no power failure signal is output. Therefore, the voltage on each device
48V is always supplied. In this state, the control unit 22
Causes the start / stop signal to be activated regardless of the state of the line monitor 20, and power is supplied from the power supply device 10 to the modem 2 and the controlled device 5.

Here, it is assumed that the commercial power supply is cut off. The power facility 11 notifies the control unit 22 of the power failure signal, but the power of -48V is supplied to each device. Therefore, the power feeding unit 23 is connected to the incoming call detecting unit 24 and the control unit 2.
The power supply to 2 continues. The control unit 22 controls the power equipment 11
When the power failure signal from is received, the in-operation display output of the controlled device 5 is referred to.

When the controlled device 5 is not in operation, a stop signal is promptly output to the power supply device 10. Upon receiving this stop signal, the power supply device 10 stops power supply to the modem 2 and the controlled device 5. This can prevent wasteful consumption of the battery 11a. If the controlled device 5 is operating, wait until the controlled device 5 stops operating, and then power the power supply 10
Give a stop signal to.

It is assumed that the incoming call detecting unit 24 detects an incoming call from the public network during the power failure state. When the control unit 22 receives the incoming call signal from the incoming call detection unit 24, the power supply device 1
A start signal is given to 0. As a result, power is supplied from the power supply device 10 to the modem 2 and the controlled device 5, and these devices start predetermined operations.

When the commercial power source is restored, the power facility 1
The power failure signal from 1 is turned off. Upon receiving the OFF signal, the control unit 22 activates the power supply device 10 regardless of the output of the incoming call detection unit 24. Upon receiving the activation signal, the power supply device 10 supplies power to the modem 2 and the controlled device 5. In addition, in the state where the power failure signal OFF is received,
When the start / stop signal is in the activated state, the control unit 22 maintains the activated state as it is.

In the above-described embodiment, since the terminal device side is not notified of the presence or absence of a power failure, if the operator of the terminal device side is operating endlessly, the power cannot be turned off. Therefore, the occurrence of a power outage is notified to the control target device 5, and the control target device 5 notifies the terminal device side of the power outage via the public network. Thereby, the operator can know the occurrence of the power failure, and when there is no particular urgent need, the operation is quickly terminated to accelerate the stop operation of the power supply device 10,
The power saving effect can be improved.

FIG. 4 is a block diagram showing the essential parts of another embodiment of the present invention. The same parts as those in FIG. 2 are designated by the same reference numerals. In this embodiment, a switch SW whose ON / OFF is controlled by the control unit 22 is provided between the public network and the modem 2. Other configurations are the same as those in FIG.

The switch SW is turned off from the control unit 22 at the time of power failure, and when the control unit 22 gives a start signal to the power supply device 10 during the power failure state, the control unit 22 turns on the switch SW. . While the switch SW is turned on after the activation signal is supplied to the power supply device 10, for example, the modem 2 performs a self-test. During this self-test, switch S
When there is no W, unnecessary signals from the modem 2 flow out via the public network. As a result of this unnecessary signal leaking to the public network, the public network may be disconnected in the worst case. In order to eliminate such a problem, when power is supplied from the power supply device 10 to the modem 2, when the modem 2 performs a self-test, an unnecessary signal during the self-test is prevented from leaking to the line. The switch SW disconnects the line. The control unit 22 turns on the switch SW at the time when the self-test of the modem 2 is completed. As a result, the modem 2 and the public network are connected, and the call state is established.

When the commercial power is restored, the control unit 22 sets the start / stop signal to the start state, and then the modem 2
The switch SW is connected to the public network after a timing sufficient to include the self-test time of 1.

FIG. 5 is a block diagram showing the configuration of the essential part of another embodiment of the present invention. The same parts as those in FIG. 2 are designated by the same reference numerals. In this embodiment, a power failure signal is given from the control unit 22 to the controlled device 5.

According to the present invention, the modem 2 and the controlled device 5 can be operated even if a power failure occurs. Therefore,
Since the operator 30 does not know that there is a power failure, it may happen that the operation of the controlled device 5 continues forever.
If left as it is, the battery 11a in the power equipment 11 will be consumed.

In order to prevent such a situation, the control unit 2
2 notifies the controlled device 5 of the power failure. This power failure notification is displayed on the display unit of the controlled device 5 and the operator 3
0 is notified. When the operator 30 receives this notification,
Strive to end your own operations promptly. As a result, consumption of the battery 11a can be prevented.

In the embodiments shown in FIGS. 4 and 5, the line monitor 21 is used as a device in the control device 20 connected to the public network.
However, the incoming call detection unit 24 may be used.

[0034]

As described above in detail, according to the present invention, it is possible to provide the power supply control system capable of reducing the power consumption of the battery at the time of power failure.

[Brief description of drawings]

FIG. 1 is a principle block diagram of the present invention.

FIG. 2 is a configuration block diagram showing an embodiment of the present invention.

FIG. 3 is a configuration block diagram showing another embodiment of the present invention.

FIG. 4 is a configuration block diagram showing a main part of another embodiment of the present invention.

FIG. 5 is a configuration block diagram showing a main part of another embodiment of the present invention.

FIG. 6 is a conceptual diagram of a conventional communication system.

[Explanation of symbols]

 2 modem 5 control target device 10 power supply device 11 power equipment 11a battery 20 control device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriko Yasuda 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Within Fujitsu Limited (72) Inventor Shigeru Kitabatake 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph Telephone Incorporated (72) Inventor Junji Shobuoku 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (6)

[Claims] 1. A modem (2) connected to a public network, a control target device (5) connected to the public network via the modem (2) and performing a predetermined process, and the modem (2) and A power supply device (10) for supplying power to the controlled device (5) and a power supply from a commercial power supply are used to supply power to each device, and a disconnection of the commercial power supply is detected to output a power failure signal,
In the event of a power failure, the power equipment (11) that supplies power from the built-in battery, and the incoming signal from the public network and the power failure signal from the power equipment (11) are detected to start / stop the power supply device (10). A power supply control system comprising a control device (20) for controlling. 2. The control device (20) monitors the public network, and when a power failure signal is received during disconnection of the line, immediately sends a stop signal to the power supply device (10) to connect the line. The power supply control system according to claim 1, wherein when a power failure signal is received, the line is disconnected, and then a stop signal is sent to the power supply device (10). 3. The controlled device (5) notifies the controlled device (20) that it is in operation, and when a power failure signal occurs, the controlled device (20) While receiving the in-operation signal from (5), stop sending the stop signal, send the stop signal to the power supply device (10) after the in-operation signal disappears, and immediately stop if there is no in-operation signal The power supply control system according to claim 1, wherein a signal is transmitted. 4. A switch (SW) is provided between the public network and the modem (2), and the control device (20) gives a start-up after power-off to the power supply device (10) and then only for a predetermined period. The power supply control system according to claim 1, wherein the switch (SW) is turned off. 5. The control device (20) gives a signal indicating that a power failure has occurred to the control target device (5), and the control target device (5) notifies an operator of the power failure occurrence. The power supply control system according to claim 1, wherein the operation time is shortened during the power failure period. 6. The control target device (5) notifies the terminal device side via the public network of the occurrence of a power failure, thereby accelerating the processing on the terminal device side and saving the battery power. The power supply control system according to claim 1, wherein the power supply control system is a power supply control system.